/Engine/Source/Developer/SourceControl/Public/ISourceControlModule.h
Show the source control login dialog
void ShowLoginDialog ( const [FSourceControlLoginClosed](API\Developer\SourceControl\FSourceControlLoginClosed) & InOnSourceControlLoginClosed, [ELoginWindowMode::Type](API\Developer\SourceControl\ELoginWindowMode__Type) InLoginWindowMode, [EOnLoginWindowStartup::Type](API\Developer\SourceControl\EOnLoginWindowStartup__Type) InOnLoginWindowStartup )